LDG RT-100 Operation Manual - page 3
PAGE 3
INTRODUCTION
LDG pioneered the automatic, wide-range switched-L tuner in 1995. From its laboratories in
St. Leonard, Maryland, LDG continues to define the state of the art in this field with innovative
automatic tuners and related products for every amateur need.
Congratulations on selecting the RT-100 100-watt remote automatic tuner. The RT-100
provides full- and semi-automatic antenna tuning across the entire HF spectrum plus 6 meters, at
power levels up to 100 watts. It will tune dipoles, verticals, Yagis, or virtually any coax-fed
antenna. It will match an amazing range of antennas and impedances, far greater than some other
tuners you may have considered, including the built-in tuners on many radios.
The RT-100 is similar to previous LDG tuners, but is powered over coax, so that the tuner
element may be placed as near to the antenna as possible. The tuner element is powered over the
coax feedline by means of a built-in bias tee, so no additional cables are required in order to
place the tuner at the antenna end of the feedline. By placing the tuner as close to the antenna as
possible, SWR losses over the length of the feedline are minimized.
The optional RC-100 control unit for the RT-100 provides DC power injection via a bias tee,
as well as a convenient on/off switch, power indicator, and TUNE button, which momentarily
interrupts power to the RT-100.
JUMPSTART, OR “REAL HAMS DON’T READ MANUALS!”
Ok, but at least read this one section before operating the RT-100:
1.
Turn off power to your radio.
2.
Connect the antenna jack on the transceiver to the “Radio” jack on the optional RC-100 or
the “RF” jack of a bias tee (not included).
3.
Connect the “Tuner” jack of the optional RC-100 or “RF+DC” jack of a bias tee to the
“Radio” jack on the RT-100, via your antenna’s existing feedline.
4.
Connect the antenna to the “Ant” jack on the RT-100.
5.
Connect a source of 12VDC, 500mA to the Power jack on the optional RC-100 or the bias
tee.
6.
Begin transmitting; the tuner will automatically begin tuning if there is an SWR mismatch.